What deficiencies did Kotlin developers aim to address when creating this language?

When creating Kotlin, developers aimed to eliminate the following shortcomings of Java:

• Code verbosity: Kotlin has less boilerplate and repetitive code thanks to its concise syntax.
• Lack of null-safety support: Kotlin natively supports null safety, reducing the number of NullPointerException errors.
• Difficulties with functional programming: Kotlin supports higher-order functions, lambdas, and other functional features.
• Lack of class extendability: Kotlin allows creating extensions of functions and properties without inheritance.
• Compatibility issues and modern features: Kotlin is fully compatible with Java but offers more modern constructs and improved coroutine support for asynchronous programming.

Thus, Kotlin improves development convenience, safety, and expressiveness compared to Java.